High-strength silver-free copper-based brazing filler metal

Abstract

The invention discloses a high-strength silver-free copper-based brazing filler metal which is composed of P, Sn, Ni and Cu. The high-strength silver-free copper-based brazing filler metal is low in cost, safe, environmentally friendly and good in welding effect; through the adding of Sn and Ni, the melting point of brazing filler metal alloy is reduced, and the tensile strength and wettability of the brazing filler metal alloy are enhanced.

Description

Technical Field

[0001] This invention relates to a brazing filler metal, specifically a high-strength silver-free copper-based brazing filler metal. Background Technology

[0002] Brazing is widely used for welding dissimilar metals such as copper, stainless steel, stainless iron, and copper alloys. These metals typically require Ag-based or Ag-containing copper-based brazing filler metals, and some manufacturers even use cadmium-containing silver-based filler metals to achieve satisfactory brazing results. However, Ag is a precious metal, increasing costs for companies and wasting scarce national resources. Furthermore, cadmium-containing filler metals cause severe environmental pollution and are toxic to humans, significantly limiting the application of brazing technology in these fields. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a high-strength silver-free copper-based brazing filler metal that is low in cost, safe and environmentally friendly, and has good welding effect.

[0004] The technical problem to be solved by this invention is achieved by the following technical solution:

[0005] A high-strength, silver-free, copper-based solder is composed of the following components by mass percentage:

[0006] P: 5%

[0007] Sn: 1-4%

[0008] Ni: 1-2%

[0009] The balance is Cu.

[0010] The preferred mass percentages of each component are:

[0011] P: 5%

[0012] Sn: 4%

[0013] Ni: 1%

[0014] The balance is Cu.

[0015] The beneficial effects of this invention are: low cost, safety and environmental protection, and good welding effect. By adding Sn and Ni, the melting point of the brazing alloy is reduced, and the tensile strength and wetting properties of the brazing alloy are enhanced. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific embodiments.

[0017] A high-strength, silver-free, copper-based solder is composed of the following components by mass percentage:

[0018] P: 5%

[0019] Sn: 1-4%

[0020] Ni: 1-2%

[0021] The balance is Cu.

[0022] The preferred mass percentages of each component are:

[0023] P: 5%

[0024] Sn: 4%

[0025] Ni: 1%

[0026] The balance is Cu.

[0027] A high-strength silver-free copper-based brazing alloy is available, which is low in cost, safe and environmentally friendly, and has good welding effect. By adding Sn and Ni, the melting point of the brazing alloy is lowered, and the tensile strength and wetting properties of the brazing alloy are enhanced.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Examples

Embodiment Construction

[0016] In order to make it easy to understand the technical means, creative features, goals and effects achieved by the present invention, the present invention will be further explained in conjunction with specific embodiments below.

[0017] A high-strength silver-free copper-based solder is composed of the following components by mass percentage:

[0018] P: 5%

[0019] Sn: 1-4%

[0020] Ni: 1-2%

[0021] The remainder is Cu.

[0022] The preferred mass percentage of each component is:

[0023] P: 5%

[0024] Sn: 4%

[0025] Ni: 1%

[0026] The remainder is Cu.

[0027] A high-strength silver-free copper-based solder with low cost, safety and environmental protection, and good welding effect. By adding Sn and Ni, the melting point of the solder alloy is reduced, and the tensile strength and wettability of the solder alloy are enhanced.

[0028] The basic principles and main features and advantages of the present invention have been shown and described above. Those skilled in the industry s...

Technical Field

[0001] This invention relates to a brazing filler metal, specifically a high-strength silver-free copper-based brazing filler metal. Background Technology

[0002] Brazing is widely used for welding dissimilar metals such as copper, stainless steel, stainless iron, and copper alloys. These metals typically require Ag-based or Ag-containing copper-based brazing filler metals, and some manufacturers even use cadmium-containing silver-based filler metals to achieve satisfactory brazing results. However, Ag is a precious metal, increasing costs for companies and wasting scarce national resources. Furthermore, cadmium-containing filler metals cause severe environmental pollution and are toxic to humans, significantly limiting the application of brazing technology in these fields. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a high-strength silver-free copper-based brazing filler metal that is low in cost, safe and environmentally friendly, and has good welding effect.

[0004] The technical problem to be solved by this invention is achieved by the following technical solution:

[0005] A high-strength, silver-free, copper-based solder is composed of the following components by mass percentage:

[0006] P: 5%

[0007] Sn: 1-4%

[0008] Ni: 1-2%

[0009] The balance is Cu.

[0010] The preferred mass percentages of each component are:

[0011] P: 5%

[0012] Sn: 4%

[0013] Ni: 1%

[0014] The balance is Cu.

[0015] The beneficial effects of this invention are: low cost, safety and environmental protection, and good welding effect. By adding Sn and Ni, the melting point of the brazing alloy is reduced, and the tensile strength and wetting properties of the brazing alloy are enhanced. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific embodiments.

[0017] A high-strength, silver-free, copper-based solder is composed of the following components by mass percentage:

[0018] P: 5%

[0019] Sn: 1-4%

[0020] Ni: 1-2%

[0021] The balance is Cu.

[0022] The preferred mass percentages of each component are:

[0023] P: 5%

[0024] Sn: 4%

[0025] Ni: 1%

[0026] The balance is Cu.

[0027] A high-strength silver-free copper-based brazing alloy is available, which is low in cost, safe and environmentally friendly, and has good welding effect. By adding Sn and Ni, the melting point of the brazing alloy is lowered, and the tensile strength and wetting properties of the brazing alloy are enhanced.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Examples

Embodiment Construction

[0016] In order to make it easy to understand the technical means, creative features, goals and effects achieved by the present invention, the present invention will be further explained in conjunction with specific embodiments below.

[0017] A high-strength silver-free copper-based solder is composed of the following components by mass percentage:

[0018] P: 5%

[0019] Sn: 1-4%

[0020] Ni: 1-2%

[0021] The remainder is Cu.

[0022] The preferred mass percentage of each component is:

[0023] P: 5%

[0024] Sn: 4%

[0025] Ni: 1%

[0026] The remainder is Cu.

[0027] A high-strength silver-free copper-based solder with low cost, safety and environmental protection, and good welding effect. By adding Sn and Ni, the melting point of the solder alloy is reduced, and the tensile strength and wettability of the solder alloy are enhanced.

[0028] The basic principles and main features and advantages of the present invention have been shown and described above. Those skilled in the industry s...

Claims

1. A high-strength, silver-free, copper-based brazing filler metal, characterized in that, It is composed of the following components by mass percentage: P： 5% Sn: 1-4% Ni: 1-2% The balance is Cu.

2. The high-strength silver-free copper-based brazing filler metal according to claim 1, characterized in that, It is composed of the following components by mass percentage: P： 5% Sn: 4% Ni: 1% The balance is Cu.